I've added it to see if it increases the number of click-throughs on the auto-linked text in posts...like
Comma Butterfly and
Fly Agaric. The stats seem to show that a lot of visitors don't tend to click on links unless they're underlined like they are in most sites on the web.
If it doesn't make much difference then I'll probably put it back to the old style, but after a number of recent improvements we're seeing a massive drop in the site's bounce rate (the number of visitors who only look at one page) and it's usually because of things like this that they spend more time viewing the site.
Underlining the links to reference pages etc should hopefully get more visitors seeing what the site has to offer
Stu